Quick answer
If your Frigidaire dishwasher won't drain, first check the drain hose for clogs and clear the filter. If the issue persists, inspect the drain pump and air gap for blockages. Ensure the dishwasher is level and the drain hose isn't kinked.
Confirm the symptom
- Standing water in the dishwasher after a cycle
- Dishes remain wet despite a completed cycle
- Gurgling or bubbling sounds during or after a cycle
- Water backs up into the sink or dishwasher drain hose
Tools and prep
- Screwdriver (flathead and Phillips)
- Flashlight
- Plunger (optional)
- Bucket or towel
- Rubber gloves
- White vinegar or baking soda
- Turn off the dishwasher's power at the circuit breaker
- Shut off the water supply to the dishwasher
Step-by-step troubleshooting
- Check for Standing WaterDo: Open the dishwasher door and look for standing water at the bottom.Observe: If water is present, the drain system is likely blocked.Means: A blockage in the drain hose, filter, or pump.Next: Clear the filter and drain hose.
- Clear the FilterDo: Locate the filter at the bottom of the dishwasher tub and remove it. Clean it with a brush and water.Observe: If the filter is clogged with food particles or debris, cleaning it may resolve the issue.Means: Clogged filter preventing proper drainage.Next: Inspect the drain hose.
- Inspect the Drain HoseDo: Check the drain hose for kinks, clogs, or blockages. Disconnect the hose and flush it with water.Observe: If the hose is clear and free of kinks, it's likely not the issue.Means: Clogged or kinked drain hose restricting water flow.Next: Check the air gap (if installed).
- Check the Air GapDo: Locate the air gap on the sink countertop and remove the cap. Use a brush or pipe cleaner to clear any debris.Observe: If the air gap is clogged, water cannot drain properly.Means: Clogged air gap preventing drainage.Next: Test the drain pump.
- Test the Drain PumpDo: Listen for the drain pump during the cycle. If it's not running, check for damage or blockage.Observe: If the pump is silent or making unusual noises, it may be faulty.Means: Faulty or clogged drain pump.Next: Consult a professional if the pump is damaged.
- Ensure Dishwasher is LevelDo: Check the dishwasher's leveling legs and adjust them if necessary.Observe: If the dishwasher is tilted, water may not drain correctly.Means: Improper leveling causing drainage issues.Next: Run a test cycle.
- Run a Test CycleDo: After clearing the filter, drain hose, and air gap, run a test cycle with the dishwasher empty.Observe: If the dishwasher drains properly, the issue was likely a clog.Means: Successful test cycle confirms the problem was resolved.Next: Monitor for recurring issues.
- Monitor for Recurring IssuesDo: Use the dishwasher normally and observe if the drainage problem returns.Observe: If the problem recurs, there may be a deeper issue with the drain pump or plumbing.Means: Persistent drainage issues indicate a more serious problem.Next: Contact a professional technician.
Common causes
| Cause | Likelihood | Difficulty | Part often needed |
|---|---|---|---|
| Clogged Filter Food particles and debris can accumulate in the filter, blocking water flow. | Common | Easy | Filter cleaning kit |
| Clogged Drain Hose Grease, food particles, or debris can block the drain hose. | Common | Easy–Medium | Drain hose |
| Clogged Air Gap The air gap can become clogged with debris, preventing proper drainage. | Sometimes | Easy | Air gap cleaning kit |
| Faulty Drain Pump A malfunctioning or clogged drain pump can prevent water from draining. | Sometimes | Hard | Drain pump |
| Improper Leveling If the dishwasher is not level, water may not drain correctly. | Rare | Easy | Leveling legs |
| Blocked Plumbing A blockage in the home's plumbing system can prevent the dishwasher from draining. | Rare | Hard | Plumbing inspection |
| Faulty Float Switch A faulty float switch can prevent the drain pump from activating. | Rare | Medium | Float switch |
| Damaged Drain Hose Cracks or damage in the drain hose can cause leaks or blockages. | Rare | Medium | Drain hose replacement |
Parts matching
If you need to replace parts, here are common replacements for a Frigidaire dishwasher that won't drain:
- Filter cleaning kit
- Drain hose
- Air gap cleaning kit
- Drain pump
- Leveling legs
- Float switch
- Plumbing inspection (by professional)
Before purchasing parts, ensure the dishwasher is unplugged and the water supply is turned off to avoid electrical hazards.
When to call a professional
- If the dishwasher still won't drain after clearing the filter, drain hose, and air gap
- If the drain pump is damaged or not functioning
- If there is a blockage in the home's plumbing system
- If the float switch is faulty and needs replacement
- If the dishwasher is not level and adjustments don't resolve the issue
- If you're unsure about any step or feel unsafe performing repairs
FAQ
How often should I clean the dishwasher filter?
It's recommended to clean the filter every 1–2 months to prevent clogs and ensure proper drainage.
Can I use a plunger to unclog the dishwasher drain?
Yes, a plunger can be used to clear minor clogs in the drain hose or air gap. Ensure the area is filled with water for the plunger to create suction.
Why is my dishwasher making gurgling sounds during the cycle?
Gurgling sounds often indicate a clogged drain hose or air gap, preventing proper water flow and drainage.
What should I do if the drain pump is not working?
If the drain pump is not working, it may need to be replaced. Contact a professional technician for assistance.
Can improper leveling cause drainage issues?
Yes, if the dishwasher is not level, water may not drain correctly. Adjust the leveling legs to ensure the dishwasher is even.
How can I prevent future drainage issues?
Regularly clean the filter, use a dishwasher cleaner to remove buildup, and ensure the drain hose and air gap are clear of debris.